package com.tidc.match.code;

import java.awt.*;
import java.awt.image.BufferedImage;
import java.util.Random;

/**
 * @ClassNmae t
 * @Description TODO
 * @Author 14631
 **/

public class VerifyCode {

	public static String drawRandomText(int width, int height, BufferedImage verifyImg) {

		Graphics2D graphics = (Graphics2D) verifyImg.getGraphics();

		graphics.setColor(Color.WHITE);//设置画笔颜色-验证码背景色

		graphics.fillRect(0, 0, width, height);//填充背景

		graphics.setFont(new Font("微软雅黑", Font.BOLD, 40));

		//数字和字母的组合

		String baseNumLetter = "123456789abcdefghijklmnopqrstuvwxyzABCDEFGHJKLMNPQRSTUVWXYZ";

		StringBuffer sBuffer = new StringBuffer();

		int x = 10;  //旋转原点的 x 坐标

		String ch = "";

		Random random = new Random();

		for (int i = 0; i < 4; i++) {

			graphics.setColor(getRandomColor());

			//设置字体旋转角度

			int degree = random.nextInt() % 30;  //角度小于30度

			int dot = random.nextInt(baseNumLetter.length());

			ch = baseNumLetter.charAt(dot) + "";

			sBuffer.append(ch);

			//正向旋转

			graphics.rotate(degree * Math.PI / 180, x, 45);

			graphics.drawString(ch, x, 45);

			//反向旋转

			graphics.rotate(-degree * Math.PI / 180, x, 45);

			x += 48;

		}

		//画干扰线

		for (int i = 0; i < 6; i++) {

			// 设置随机颜色

			graphics.setColor(getRandomColor());

			// 随机画线

			graphics.drawLine(random.nextInt(width), random.nextInt(height),

					random.nextInt(width), random.nextInt(height));

		}

		//添加噪点

		for (int i = 0; i < 30; i++) {

			int x1 = random.nextInt(width);

			int y1 = random.nextInt(height);

			graphics.setColor(getRandomColor());

			graphics.fillRect(x1, y1, 2, 2);

		}

		return sBuffer.toString();

	}

	/**
	 * 随机取色
	 */

	private static Color getRandomColor() {

		Random ran = new Random();

		Color color = new Color(ran.nextInt(256),

				ran.nextInt(256), ran.nextInt(256));

		return color;

	}
}



